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Standard XII

Physics

Frames of Reference

A bird is fly...

Question

A bird is flying 3 m above the surface of water. If the bird is diving vertically down with speed = 6 m/s, his apparent velocity as seen by a stationary fish underwater is:

8 m/s

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6 m/s

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12 m/s

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4 m/s

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Solution

The correct option is A 8 m/s
Apparent height of image = $μ (h)$
Velocity = $\frac{d i}{d t} = μ \frac{d h}{d t} = \frac{4}{3} .6 = 8 m / s$
So, option (A)

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A bird is flying 3 m above the surface of water. If the bird is diving vertically down with speed = 6 m/s, his apparent velocity as seen by a stationary fish underwater is:

The correct option is A 8 m/sApparent height of image = μ(h) Velocity = didt=μdhdt=43.6=8m/s So, option (A)

The correct option is A 8 m/s
Apparent height of image = $μ (h)$
Velocity = $\frac{d i}{d t} = μ \frac{d h}{d t} = \frac{4}{3} .6 = 8 m / s$
So, option (A)